CVE-2022-36780 in CIS
Summary
by MITRE • 09/13/2022
Avdor CIS - crystal quality Credentials Management Errors. The product is phone call recorder, you can hear all the recorded calls without authenticate to the system. Attacker sends crafted URL to the system: ip:port//V=2;ChannellD=number;Ext=number;Command=startLM;Client=number;Request=number;R=number number - id of the recorded number.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 10/16/2022
The vulnerability identified as CVE-2022-36780 resides within the Avdor CIS crystal quality phone call recorder system, representing a critical authentication bypass flaw that undermines fundamental security controls. This credential management error allows unauthorized attackers to access all recorded phone calls without proper system authentication, fundamentally compromising the confidentiality and integrity of sensitive communication data. The vulnerability manifests through a crafted URL manipulation technique that exploits improper access control mechanisms within the system's web interface.
The technical flaw stems from insufficient input validation and authentication checks within the call recording system's URL parameter handling. When attackers construct specific URL parameters including V=2;ChannellD=number;Ext=number;Command=startLM;Client=number;Request=number;R=number, they can directly access recorded call files without proper authorization. This vulnerability directly maps to CWE-287 which addresses improper authentication issues, and represents a classic case of weak access control where system resources are exposed through predictable URL structures. The system fails to validate user credentials or session tokens before granting access to recorded call data, creating an unauthenticated access path to sensitive information.
The operational impact of this vulnerability is severe and far-reaching, as it enables complete unauthorized access to all call recordings stored within the system. Attackers can potentially access confidential business communications, personal conversations, and sensitive data exchanges without any authentication requirements. This compromises not only privacy but also business continuity and regulatory compliance, particularly in environments subject to data protection regulations such as GDPR, HIPAA, or SOX requirements. The vulnerability affects any system administrator or attacker who can access the targeted IP address and port, making it particularly dangerous in network environments where such systems are exposed to external traffic.
Mitigation strategies should focus on implementing robust authentication mechanisms and access control validation throughout the system. Organizations should immediately patch the system to enforce proper authentication checks before granting access to recorded calls, implement session management controls, and validate all URL parameters against a whitelist of acceptable values. The system should enforce role-based access controls where only authorized personnel can access specific call recordings based on their permissions and need-to-know basis. Network segmentation should be implemented to restrict direct external access to the call recording system, and all URL parameters should undergo strict validation to prevent injection attacks. Additionally, implementing logging and monitoring of access attempts can help detect unauthorized access patterns and provide audit trails for security investigations. The remediation approach should align with NIST cybersecurity framework principles and incorporate defense-in-depth strategies to prevent similar credential management errors in future system implementations.